Numerical simulation of spreading process of lunar regolith simulant by DEM

被引：0
|
作者：
Li W. [1 ]
Xu K. [1 ]
Huang Y. [2 ]
Hu W. [1 ]
Wang D. [3 ]
机构：
[1] Aero Engine Academy of China, Beijing
[2] School of Aeronautic Science and Engineering, Beihang University, Beijing
[3] College of Engineering, Peking University, Beijing
来源：
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | 2020年 / 46卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Additive manufacturing; Discrete Element Method (DEM); Lunar exploration; Lunar regolith simulant; Particle superposition model;
D O I：
10.13700/j.bh.1001-5965.2019.0443
中图分类号：
学科分类号：
摘要：
Spaced-based Selective Laser Melting (SLM) technique in combination with In-Situ Resource Utilization (ISRU) concept can be an off-world manufacturing solution to the significant engineering challenge on the large-scale construction for extra-terrestrial bases. Powder spreading process in SLM has a major impact on the characteristics and quality of final part. The geometric shape of the lunar regolith simulant particles was modeled by means of a non-spherical particle superposition model method. The particle's dynamic model was established based on linear spring-damping contact model, Hamaker theory and Newton's laws of motion. A three-dimensional Discrete Elemeat Method (DEM) technique with soft-sphere approach was employed to investigate the rheological behavior of the lunar regolith simulant powder during spreading process under various conditions. The results show that the proposed model and method can be used to study the flowability and packing behavior of lunar regolith simulant powder system as a function of process and environmental condition parameters. Lunar reduced gravity leads to larger values of surface roughness and smaller values of packing density and averaged coordination number of powder bed; the quality of lunar regolith simulant powder bed during spreading process under lunar gravity can be improved by reducing spreading speed and geometrically optimizing blade type spreader profile, resulting in a denser and more uniform powder bed. © 2020, Editorial Board of JBUAA. All right reserved.
引用
收藏
页码：1863 / 1873
页数：10
相关论文
共 27 条
  • [1] SANDERS G B, LARSON W E, PICARD M., Development and demonstration of sustainable surface infrastructure for Moon/Mars exploration, 62nd International Astronautical Congress, (2011)
  • [2] FATERI M, GEBHARDT A., Experimental investigation of selective laser melting of lunar regolith for in-situ applications, International Mechanical Engineering Congress and Exposition, (2013)
  • [3] HAFLEY R A., Electron beam free-form fabrication in the space environment, Aerospace Sciences Meeting and Exhibit, pp. 8-11, (2007)
  • [4] PRATER T, WERKHEISER N, LEDBETTER F., 3D printing in zero G technology demonstration mission: Complete experimental results and summary of related material modeling efforts, International Journal of Advanced Manufacturing Technology, 101, 1-4, pp. 391-417, (2019)
  • [5] WERKHEISER N., In-space manufacturing: 3D printing in space technology demonstration, National Space & Missile Materials Symposium, pp. M15-4685, (2015)
  • [6] CECCANTI F, DINI E, KESTELIER X D, Et al., 3D printing technology for a Moon outpost exploiting lunar soil, 61st International Astronautical Congress, pp. 8812-8820, (2010)
  • [7] CESARETTI G, DINI E, DE KESTELIER X, Et al., Building components for an outpost on the lunar soil by means of a novel 3D printing technology, Acta Astronautica, 93, pp. 430-450, (2014)
  • [8] BALLA V K, ROBERSON L B, OCONNOR G W, Et al., First demonstration on direct laser fabrication of lunar regolith parts, Rapid Prototyping Journal, 18, 6, pp. 451-457, (2012)
  • [9] FATERI M, GEBHARDT A., Process parameters development of selective laser melting of lunar regolith for on-site manufacturing applications, International Journal of Applied Ceramic Technology, 12, 1, pp. 46-52, (2015)
  • [10] GOULAS A, BINNER J G P, HARRIS R A, Et al., Assessing extraterrestrial regolith material simulants for in-situ resource utilization based 3D printing, Applied Materials Today, 6, pp. 54-61, (2017)
123